#283F52

#283F52

Color Values

HEX

#283F52

RGB

40, 63, 82

HSL

207.1, 34.4%, 23.9%

HSV

207.1, 51.2%, 32.2%

CMYK

51.2%, 23.2%, 0.0%, 67.8%

OKLCH

0.3574 0.0439 244.4

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#283F52

#523B28

Analogous

#285250

#282A52

#283F52

Triadic

#283F52

#52283F

#3F5228

Split Complementary

#283F52

#52282A

#525028

Tetradic

#283F52

#502852

#523B28

#2A5228

Color Blindness Simulation

Original

#283F52

Protanopia

#32324D

Deuteranopia

#312F4C

Tritanopia

#294A49

Achromatopsia

#3B3B3B

CSS Usage

background-color: #283F52;
color: #283F52;
border-color: #283F52;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F8FA
100
#E8EEF2
200
#CFDCE8
300
#ADC4D7
400
#80A4C1
500
#5484AB
600
#436989
700
#36546E
800
#2A4256
900
#21323F
950
#152028

Contrast Checker

Text on white

10.92:1

AA Pass AAA Pass

Text on black

1.92:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026